optionbutton
nounUK /ˈɒpʃən ˈbʌtən/
US /ˈɑːpʃən ˈbʌtən/
A small button you click to pick one choice from a group.
Click the option button next to your favorite color.
OTHER MEANINGS
2. A control in a dialog box that lets you choose one setting among several.
Select the option button for English.
3. A clickable circle in a computer form that shows your chosen answer.
The option button turned blue when she picked answer B.
4. A button on a device or screen that selects a mode or setting.
Press the option button to switch to silent mode.